[93.12] Study of the Molecular Line Emission Associated with the HH 270 Outflow

Y.-W. Tang (NTHU/ASIAA), M. Choi (ASIAA)

We present our recent observations of the HH 270 region with
BIMA array in the 13CO and C18O 1-0 lines. The HH 270
Herbig-Haro jet is driven by a protostar in the L1617 cloud.
From previous HCO+ line observations, we found that the
emission is enhanced along the jet axis, but no evidence of
mechanical disturbance was found. By comparing the line
intensities of HCO+, 13CO, and C18O, we investigate possible
molecular line enhancement mechanisms. We also discuss the
infall motion in the dense core containing the driving
source of the outflow.

We acknowledge partial support from NSC grants
89-2112-M-001-061 and 91-2112-M-001-045.